Governed pump.



N. MGUARTY. GOVERNBD PUMP. APPLICATION FILED DEG.18,1908.

2 SHEETS-SHEET 1.

51mm q vmbmcooco Patented July 27, 1909.

N. MOUARTY.

GOVERNED PUMP. APPLICATION FILED 1330.18, 1308.

929,000, Patented July 27, 1909.

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Q- ,l 5mm;

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NORMAN MoOARTY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO ATLAS W RKS OFINDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

GovnRNEn PUMP.

Specification of Letters Patent.

Patented July 27, 1909.

'' Application filed December 18, 1908. Serial No. 468,168;

useful Improvements in Governed Pumps, of

which the following is a specification.

In the operation of internal combustion engines wherein theliquid fuelisinjected into the combustion chamber subsequent 'to the time when apreliminary air charge has been compressed to an ignitin tem 'erature,thespeed regulation is accompIishe by regulating the flow of'liquid fuelinto the combustion chamber and a commonmechanism for accomplishing thisregulation com rises a pum aving a suction, or supply in ct valve whicyields and permits back HOW to the reservoir during a greater or lesserportion of the time of displacing action of the ejection piston, suchmechanism being fairly'illustrated in Patent N 0. 654,140 issued July24, 1900 and Patent No. 729,613 issued June 2, 1903. The devicesillustrated in the above mentioned patents do not, in practice, operate1n such manner as to prevent umping of the speed control governor andrequire a con-' siderable movement of the speed control governor.

The object of my present invention is therefore to produce a mechanismby means of which a speed controlled governor may control accurately andwith great sensitiveness, the position and operation of the suctionvalve of a pump in cooperation with the ing stroke. The accompanymgdrawmgs illustrate my invention.

Figure -1 is an elevation in partial vertical section of one form of mydevice, Fig. 2 a similar view of another form, and Fig. 3 a plan'of theconstruction shown in F ig. 2.

In Fig. 1, 10 indicates a pump chamber into which may be projected a dislacing piston 11 by any suitable means, suc as an arm 12 carried by aneccentric stra 13 surroundin an eccentric 14 carried y a shaft 15 drivenby the motor (not shown) to he controlled. Leading from pump chamber 10is a discharge pipe 16 with a check valve 17 arranged between said pi eand the pump chamber so as to prevent ack flov, from pipe 16 into thepump chamber. It is to be understood that in devices of this characterthe pump operates against a veryconsiderable pressure which ismaintained in the feeding atomizer of the motor so'that there isconstantly maintained in pipe 1.6 a very considerable pressure.

' Leading into pump chamber 10 is a feed pipe 21 which leads from a suply reservoir (not shown) preferably somewhat above the pump chamber sothat the liquid fuel may flow by gravity into the pump chamber when 6:;

ever the suction valve 22 is opened and piston 1 1 is Withdrawn from thepump chamber. The suction valve 22 is yieldingly held closed by a spring23 and at the outer end of its stem is provided with a head 24by meansof 7c which the suction valve may be controlled against the action ofthe spring 23.

As will be seen from the Lauster patent, I referred to above, it hasheretofore been pro posed to control the suction valve against theaction of its closing spring, by means of a fixed-ratio le v er, thefulcrum of which is automatically shifted in order to change the re.lation of the controlling lever tothe suction valve. struction thecontrolling spring of the suction valve has a directline of action,through a system-of'levers, upon the balls of the speed controlledgovernor in the same direction as the spring of the speed controlledgovernor,

c. e. in such a way as to require a greater speed of the motor to attaina governing po-' sition of the governor balls and that, so soon as thesuction valve is seatedsthis assisting force of the controlling springof the suction valve is withdrawn from the governor and r the then speedof the motor tends to immediately vary the position of the governorballs, thus causing a jumping of the governor and consequentunstabilityof the governed parts.

In order to obviate this difiioultyI provide a lever, the ratio of thearms of which may be automatically varied inorder to vary the -movementof the suction valve relative to the displacing piston, and so 106 mountsaid lever. with relation to its fulcrum that it not only'has its ratiovaried but also.

has a movement relative to the suction valve so-that its position ischanged and its effect upon the suction valve therefore changed.

' In Fig. 1, I'show a lever 31 having an m-' --clined intermediate slot32 whichis adapted to receive a fixed fulcrum 33. Lever 31 at one endcarries a roller 34 adapted to engage head 24 of valve 22 while at theother le'nd 0 It will be seen that, in such a con- 80 said lever 31 ispivotally connected at 35 with an arm 36 carried by an eccentric strap37 surrounding an eccentric 38 carried by a rock shaft 39. Lever 31 isalso connected at 35 with a link e1 which is connected to one end of thelever 42 the opposite end being connected to the displacing piston 11.nectcd to rock shaft 39 is an arm 43 which connects to an ordinary speedcontrolled governor 39.

In Fig. 2, instead of a fixed fulcrum, as in Fig. 1, I provide a fulcrum51 which is mounted in an inclined stationary guide .1: and is movableback and forth in said guide by means of an arm SIS-carried by aneccen-v tric strap 54 embracing an eccentric 55 carried by a rock shaft56 connected to a speed controlled governor as-in Fig. l. Fulcrum 51projects into a slot 32 of a lever 31 which carries a roller 34 adaptedto engage head 24 of a suction valve stem 23. The opposite end of lever31 is connectcd at 3-5 with a link 41 connected to one arm of a lever 42the opposite arm of which is connected to the dis lacing piston 11.

t will be seen that, in either of the constructions illustrated, avariation of the ratio of the controlling lever is obtained by theaction of the speed controlled governor, 'so that, ora given and uniformstroke or movement of one end of the controlling lever, the opposite endof said controlling lever is given a greater or lesser movement in thesame ried and controlled.

time so that the closing movement of the suction valve is hastened orretarded relative to the displacing movement of the displacing pistonand the volume of discharge from the pump into the discharge pipe 16 isthus variation of ratio of the controlling lever the bodily movement ofthe lever toward or from the suction valve, produced by the inclinationof the slot 32 in the form shown in-Fig. 1, and by the inclination ofthe slot 52 in the form shown in Fig. 2, further increases the variationof the controlling lever relative to the suction valve without requiringa greater movement of the speed controlled governor. It will also benoticed that the force exerted upon lever 31 by the controlling s ringof the suction valve is all frictionally a sorbed before it reaches theeccentric 38 or 55 and has practically no effect either inresistance orassistance of the usual controlling spring of the speed controlledgovernor.

I claim as my invention: v

1. The combination, in an explosive engine, of a suction valve for theliquid fuel, a

pump piston for supplying the fuel, a lever cooperating with the suctionvalve, a 0011- nection between said lever and the pump piston, andmeansv for varying the relation et'ween the lever and its fulcrum tovary the lever ratio and to shift the lever toward or from the suctionvalve.

In addition to the va- 2. The combination, in an explosive engine, of asuction valve for the liquid fuel, a pump piston for supplying the fuel,a lever cooperating with the suction valve, a connection between saidlever and the pump piston, and means for varying the relation betweenthe lever and its fulcrum to vary the lever ratio.

3. The combination, in an explosive engine, of a suction valve for theliqrYd fuel, a

pump piston for supplying the fuel, a lever cooperating with the suctionvalve, a connection bctwei-ai said lever and the pump piston and meansfor shifting said lever longitudinally and transversely on its fulcrunn4. The combination, in an explosive engine, of a suction valve for theliquid fuel, a pump piston. for supplying the fuel, a lever cooperatingwith the suction valve, a connection between said lever and the pumppiston and norms for shifting said lever longitudinally on its fulcrum.

5. A pump comprising, a main chamber having an inlet valve and an outletvalve, a pump piston associated with said chamber, a controlling leverengaging the inlet valve to control the time of closing of said valverelative to the movement of the pump piston, a connection between saidlever and 5 the pump piston, and means for varying the ratio of thelever arms and shifting the lever toward orfrom the inlet valve.

6. A pum comprising, a main chamber. having an ct valve and an outletvalve, a pump piston associated with said chamber, a contro ling leverengaging the inlet valve to control the time of closing of said valverelative to the movement of the pump piston, and means for varying theratio of the lever arms and shifting the lever toward or from the inletvalve. v

7. A pum comprising, a -main chamber having an in ct valve and an outletvalve, a pump iston associated with said chamber, a contro ling leverengaging the inlet valve to control the time of closing of said valverelative to themovem'ent of the pump piston,

a connection between said lever and the pump piston, and means forvarying the ratio of the lever arms.

8. A pump comprising, a main chamber having an inlet valve am an outletvalve, a pump piston associated with said chamber, a contro ing leverengaging the inlet valve to control the time of closing of said valverelative to the movement of the pump piston, and means for varying theratio of the lever arms.

9. A pum comprising, a main chamber 1 having an in ct valve an an outletvalve, a pump piston associated with said chamber, a controlling leverengaging the inlet valve to control the time of closing of said valverelative to the movement of the pump piston, a

connection between said lever and the pump piston, an eccentric, an armstrapped thereon, a sliding connection between the lever and its fulcruminclined transversely of the lever, anda connection between theeccentric arm and the lever whereby-a movement of the eccentric willshift the lever upon its fulcrum.

10. A pump comprising, a main chamber having an inlet valve and anoutlet valve, a pump iston associated with said chamber, a contro linglever engaging the inlet valve to control the time of closing .of saidvalve relative to the movement of the pum iston, a connection betweensaid lever and tlie pump piston, an eccentric, an arm strapped thereon,a sliding connection between the lever and its fulcrum, and a connectionbetween the eccentric arm and the'lever whereby a movement of theeccentric will shift the lever upon its fulcrum. e

11. A pump comprising, a main chamber having an inlet valve and anoutletvalve, a pump piston, associated with said chamber,

, a controlling lever engaging the inlet valve to control the time ofclosing said valve relative to the movement of the pump plston, an

eccentric, an arm strapped thereon, a sliding 12. A pump comprising, amain chamber having an inlet valve and an outlet valve, a pump istonassociated with sail chamber, a

contro ling lever engaging the inlet valve to v control the time ofclosin of said valve relative to the movement of t e lpump piston, aneccentric, an arm strapped t ereon, a sliding connection between thelever and its fulcrum and a connection between the eccentric arm and thelever whereby a movement of the eccentric will shift the lever upon itsfulcrum.

In witness whereof,-I, have hereunto set my'hand and seal atIndianapolis, Indiana, this third day of December, A. D. one thousandnine hundred and eight.

" NORMAN MoCARTY. 1,. 5.

Witnesses:

ARTHUR M. Hoon, THOMAS W. MoMEANs.

